T-square for book-binders  use



(No Model.)

A. STATTBR & J. HAUSER. T-SQUARE FOR BOOK BINDBRS USE.

N0. 354,026. Patented Dec. '7, 1886.

N4 PEI'ERS. Photoiithographur. Wnmngion. D. c.

NITE STATES Fries,

PATENT T=SQUARE FOR BOOK-BINDERS USE.

SPECIFICATION forming part of Letters Patent No, 354,026, dated December 7,1886.

Application filed June 22, 1886. Serial No. 205993. (No model.)

To aZZ whom it may concern-.-

Be it known that we. ADOLF STATTER and JACOB HAUSER, of Boston, county of Suffolk, and State of illassachusctts, have invented an Improvement in T Squares for Book-Binders and other Uses, of which the following de scription, in connection with the accompanying drawings, is a specification, likeletters on the drawings representing like parts.

It is now customary in binding books and kindred work, such as pocket-books, &c., to employ a T-square to mark off the material for the back and covers of the book, and as the dimensions of the said back .and covers vary materially an independent T-square is employed for each size, or very considerable time is required to mark off the material by other methods.

Thisinvention has for its object to construct an adjustable square for book-binders use, whereby the material for the covers and back of a book of any desired size may be marked off, adjustment of the said square being effected rapidly and with lacility.

In accordance with this invention two ordinary machinists squares, each composed of two arms extending at right angles with rela tion to each other, are placed side by side, so that two of the arms will lie parallel with each other and the other two arms extend from the parallel arms in opposite directions, to thus form a T-square. The two carpenters or L- shaped squares are connected by toggle-levers operated by a sliding bar, so that the said squares may be moved more or less from each other, a suitable set-screw being employed to secure the sliding bar in position. The two oppositely-extended arms of the Lshaped squares are provided with guide-loops to move upon a cross-bar, so that as the said squares are moved toward orfrom each other by means of the togglelevers the said oppositely-extended arms will continue to move in the same plane, while the other two arms will also remain parallel with each other, but at a greater or less distance apart.

Vhen the apparatus is placed upon the material to be marked off or cut, the two L- shaped squares will be so adjusted that the distance between the two parallel arms thereof will be equal to the width of the back, and

the two oppositely-extended arms will be employed to mark oft" the covers.

Figure 1 shows a top View of a book-bind ers T-square constructed in accordance with this invention; Fig. 2, a side view of the T- square shown in Fig. 1, and Fig. 3 a left-hand end view of the T-square shown in Fig. 1.

In constructing the T-square herein described, two ordinary L-shaped squares having arms a a b b are placed side by side, so that the two arms a b will lie parallel with each other and the two arms a b will extend in opposite directions, each of the arms a b of the L-shaped squares being provided with a guide-loop, as a I)", through which passes a crossbar, c, which serves the purpose of a guide, in order that the two L-shaped squares may be moved toward and from each other without changing the relative angles of the parts.

A bar, d, placed between the two arms a b of the two L-shaped squares,has one of its ends extended into or through a sliding block, (1, mounted upon the cross-bar c, the said sliding bar d being connected with the two arms a b of the squares by toggle-levers 2 3, which are so arranged that as the bar d is moved back and forth the two squares are uniformly moved toward and from each other alter the manner of an ortlinary parallel ruler. The sliding bar d is secured in the desired adjusted position by a set-screw. d

To use the apparatus herein described, the width of the back of the book to be bound is taken and the sliding bar d is then moved to place the arms a b at a distance apart equal to the width of the back, and the apparatus is then placed upon the material to be marked off, the arms a 1) serving as guides to lay off or measure the distance of the back of the book, the arms a b scrviug to lay off the covers. One edge of each of the arms a a b b are preferably beveled to facilitate marking, as in Figs. 2 and 3.

it will bcseen that the two L-shaped squares connected, as described, to move upon a single cross-bar, 0, form a T-squarc adjustable as to width.

It is obvious that the arms of the squares may he of any desired length, according to the work to be done.

ICO

The device herein described is especially adapted for marking off the cover of pocketbooks, diaries, and the like,wherein the back and two sides of the cover are formed of one piece and made of leather or similar material.

I claim- 1. In a T-square, two L-shaped squares placed side by side, two of the corresponding arms of the said L-shaped squares lying parallel with each other, while the other two corresponding arms extend in opposite directions, and a guide-loop for each oppositelyextended arm, combined with a cross-bar to co-operate with the guide-loops, while the L- shaped squares are being adjusted with relation each to the other, substantially as described. I

2. In a T-square, two L-shaped squares placed side by side, two of the corresponding arms of the said L-shaped squares lying parallel with each other, while the other two corresponding arms extend in opposite directions, and a guide-loop for each oppositely-extended arm, combined with a cross-bar to cooperate with the guide-loops in the movement of the-squares, and toggle-levers connected with the two L-shaped squares, and means for moving said toggle-levers to vary the distance between the said squares, substantially as described.

3. In a T -square, two L-shaped squares placed side by side, two of the corresponding arms of the said L-shaped squares lying parallel with each other, while the other two corresponding arms extend in opposite directions, and a guide-loop for each oppositely-extended arm, combined with a cross-bar to cooperate with the guide-loops and toggle-levers connected with the two L-shaped squares, and a sliding bar for moving the said toggle-levers, and a retaining device for securing the slidebar in any desired position, substantially as described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses. I

ADOLF sTATrER, JACOB HAUSER.

Witnesses:

GEO. W. GREGORY, B. JPNOYES. 

